package JUC.lock锁;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * @author CKC
 * @DateTime 2021/3/15 19:59
 * <p>
 * 备注：多线程之间按顺序调用，实现A->Son->C
 * 三个线程启动，要求
 * <p>
 * AA打印5次，BB打印10次，CC打印15 次
 * 接着
 * AA打印5次，BB打印10次，CC打印15 次
 * 来10轮
 */
public class ConditionDemo {
    public static void main(String[] args) {
        ShareDate shareDate = new ShareDate();
        new Thread(()->{
            for (int i = 1; i <= 10; i++) {
                shareDate.print5();
            }
        },"A").start();
    
        new Thread(()->{
            for (int i = 1; i <= 10; i++) {
                shareDate.print10();
            }
        },"Son").start();
    
        new Thread(()->{
            for (int i = 1; i <= 10; i++) {
                shareDate.print15();
            }
        },"C").start();
        
    }
}


class ShareDate {
    private int number = 1;//a:1    b:2     c:3
    private Lock lock = new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();
    
    
    public void print5() {
        lock.lock();
        try {
            while (number != 1) {
                c1.await();
            }
            for (int i = 0; i < 5; i++) {
                System.out.println(Thread.currentThread().getName() + "\t" + i);
            }
            number = 2;
            c2.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
    
    public void print10() {
        lock.lock();
        try {
            while (number != 2) {
                c2.await();
            }
            for (int i = 0; i < 10; i++) {
                System.out.println(Thread.currentThread().getName() + "\t" + i);
            }
            number = 3;
            c3.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
    
    public void print15() {
        lock.lock();
        try {
            while (number != 3) {
                c3.await();
            }
            for (int i = 0; i < 15; i++) {
                System.out.println(Thread.currentThread().getName() + "\t" + i);
            }
            number = 1;
            c1.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
}